Patent US2582088A successfully refreshed from Google Patents.
US2582088A
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Two-stage hydraulic amplifier
Assignee: General Electric Co
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Filing: 1947-11-01
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Granted: 1952-01-08
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Expires: 1967-11-01
Abstract
No abstract record available.
Inventors
- 👤 Earle R Walthers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0435; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2365; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/8593; Y10T137/86493; Y10T137/86501
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |